Robust adaptive beamforming of volumetric arrays

Ivars P. Kirsteins, Hongya Ge

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper considers the development of adaptive beamforming algorithms for a prototype volumetric array. Volumetric arrays are desirable in passive sonar systems because of their ability to resolve left-right ambiguity. However, adaptively beamforming volumetric arrays poses several unique challenges compared to linear arrays such as the large number of hydrophones, lack of sample support, the necessity to know accurately the x,y,z positions of all the elements, and the correlated structure of the ambient noise, even when it is isotropic. These problems are addressed by exploiting the special geometry of the prototype volumetric array by first adaptively forming beams with each of the three individual line subarrays using an expanding Krylov space obtained from a vector conjugate gradient algorithm and then adaptively beamforming the reduced-dimension line subarray beam outputs with Capon's method. The new approach is demonstrated on actual at-sea data and compared against conventional adaptive beamforming methods and is shown to work well and be highly robust.

Original languageEnglish (US)
Title of host publicationConference Record of the 41st Asilomar Conference on Signals, Systems and Computers, ACSSC
Pages1247-1251
Number of pages5
DOIs
StatePublished - Dec 1 2007
Event41st Asilomar Conference on Signals, Systems and Computers, ACSSC - Pacific Grove, CA, United States
Duration: Nov 4 2007Nov 7 2007

Publication series

NameConference Record - Asilomar Conference on Signals, Systems and Computers
ISSN (Print)1058-6393

Other

Other41st Asilomar Conference on Signals, Systems and Computers, ACSSC
CountryUnited States
CityPacific Grove, CA
Period11/4/0711/7/07

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Computer Networks and Communications

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